Malicious PDF — malware analysis report

Static analysis result for SHA-256 70dbd509955cf8a6…

MALICIOUS

PDF

45.1 KB Created: 2020-04-03 04:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 39c1b1f74be59c38f682316dc3db3f66 SHA-1: 54e3d72b1d9e208c1dfe7d0361bcde016132dd96 SHA-256: 70dbd509955cf8a64c6e07c43388a12405ed4180fa34f2be0c21f5a020f7e20c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for SEO poisoning or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of outbound links points to a content-driven lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://teamlendaris.com/uploads/1/3/0/7/130776539/130776539.html#formula+de+eficiencia+de+carnot
    • http://vastgoed-turkije-be.com/uploads/1/3/0/2/130287937/zumosoxajidatanuj.pdf
    • http://lovegan.shop/uploads/1/3/0/5/130547142/vijonokaxibomajotop.pdf
    • http://theoratorystore.com/uploads/1/3/0/6/130621337/kifupesema-jegada.pdf
    • http://dream-different.com/uploads/1/3/0/4/130476516/525447.pdf
    • http://paulplamondon.com/uploads/1/3/0/4/130483864/726986.pdf
    • http://salvationproject.org/uploads/1/3/1/1/131164574/914457.pdf
    • http://yamatohibachi.com/uploads/1/3/0/7/130776810/3129539.pdf
    • http://velvetengineinc.com/uploads/1/3/0/7/130776741/46228f82a8456.pdf
    • http://cpanel.xebex.eu/uploads/1/3/0/7/130776001/kokatativefo.pdf
    • http://ydevents.org/uploads/1/3/0/5/130588954/2468372.pdf
    • http://josephpricetheatre.com/uploads/1/3/0/4/130483980/bituzeburaxodamibi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000793f.bin
5d857e9c29140fd3d27a177265e253a97d334c5dd22cd67f9b8244315606ddc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 9580 bytes
font_01_sfnt_off00009bd2.bin
ccd4c16be78461455bc416a6b2a82209edd949535a8ea342684372e9e7370a0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD2 2736 bytes

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